For the administrator comfortable with point-and-click changes and not managing code or technical items, the best option to ensure the changes make it accurately to production is: D. Create a change set, upload it to production, and deploy the change set. Change sets are a Salesforce tool designed specifically for migrating configuration changes from one organization to another, such as from a sandbox to a production environment. They allow administrators to select and bundle the specific changes they want to deploy, including Experience Cloud site configurations, and then deploy them to production in a controlled manner. This method aligns with the administrator's comfort level with point-and-click changes and provides a straightforward way to migrate changes accurately to production.

D is the correct option. The key here is "The administrator is comfortable with point and click changes but is not comfortable with managing code or more technical items." "If you’re more comfortable working with point-and-click tools, change sets are your deployment friend. " - https://developer.salesforce.com/docs/atlas.en-us.communities_dev.meta/communities_dev/networks_migrate_overview.htm